These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
"Funny Aneurysm" Moment: As his infection grew worse and worse before finally admitting himself to the hospital, he actually joked, "Maybe I'm dying".
Hilarious in Hindsight: Always thrilled by new technology, Jim was excited to dabble in both chromakey and CGI when they were both still relatively new... fast-forward to today, where practically almost all of traditional puppetry in film and television has been replaced by chromakey and CGI (and not necessarily as advances in technology as Henson was also interested in, but rather because it's cheaper and easier than to stage elaborate scenes with traditional puppetry).
Nightmare Fuel: Many, many examples. Even the way he died could count.
Seinfeld Is Unfunny: How many people today look at all the various different puppets on TV, the internet, movies, and such, and think that none of them would probably, more than likely, not even been here today if it wasn't for Henson practically reinventing the artform of puppetry?
Frank Oz actually lampshaded this in a recent new interview, in which he says when you see puppets on TV today, they're muppets, and even compares it to "Kleenex."
He actually tried LSD, once. His experimental film from the late 60s, Youth '68, interviewed a number of young artists and musicians, many of whom admitted - on camera - to doing drugs, and admitting that drugs helped spark their creativity, and expanded their imaginations. Henson, always being fascinated with the mind, was intrigued by the idea of being able to expand your imagination, so after debating it, he gave LSD a try one evening. Nothing happened. He even wrote in his personal journal that the experience was, "A disappointment".